A Clear, Step-by-Step Autism & ADHD Assessment Process You Can Trust

Understanding the autism assessment process and ADHD diagnostic journey can feel overwhelming, especially when you are unsure what happens next. At ASD Child Ltd, we guide you through every stage with clarity, clinical expertise, and ongoing support so you can make confident decisions for your child. 

Why Families Choose ASD Child Ltd for Their Assessment Journey

  • NICE and NHS-aligned diagnostic processes
  • Experienced, fully qualified clinicians and specialists
  • Clear, jargon-free reports accepted by schools and GPs
  • One structured process from enquiry to post-diagnosis support
  • Flexible appointments, including remote consultations
  • Dedicated support for parents before, during, and after diagnosis
  • Trusted by families across South and West London

Call 07878 573131 or email info@asdchild.co.uk to speak with our team 

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Understanding the Autism & ADHD Assessment Process

If you are searching for what happens during an autism assessment or ADHD diagnosis, the most important thing to know is that the process is structured, evidence-based, and centred around your child’s individual needs.

At ASD Child Ltd, we follow recognised clinical frameworks such as those outlined by the National Institute for Health and Care Excellence (NICE) to ensure every assessment is accurate, thorough, and meaningful.

Our approach focuses on three key outcomes:

  • Clarity about your child’s development
  • A recognised diagnosis where appropriate
  • Practical guidance for next steps

To explore how this fits into your child’s needs, you can review our full range of neurodevelopmental services.

Our Assessment Process: Step-by-Step

1. Initial Enquiry & Free Consultation

Your journey begins with a conversation.

You can contact us via our contact page or book directly online. During your free telephone consultation, we will:

  • Listen to your concerns
  • Discuss your child’s behaviours, development, and areas of difficulty
  • Explain whether an Autism or ADHD assessment may be appropriate
  • Outline timelines, fees, and next steps

This step is designed to reduce uncertainty and help you feel informed before committing to an assessment.

2. Pre-Assessment Preparation

Once you decide to move forward, we gather essential background information to build a complete picture of your child’s development.

This may include:

  • Parent questionnaires
  • Developmental history forms
  • School or nursery information where relevant
  • Previous reports or supporting documentation

For ADHD assessments, you may also complete structured tools such as behavioural questionnaires and attention assessments.

This preparation ensures the assessment process is tailored, efficient, and clinically robust.

You can also explore helpful guidance in our Resource Hub to feel more prepared before your appointment.

3. Clinical Observation & Educational Information

This is the first stage of the formal assessment process.

For Autism assessments, we begin with a structured observation using recognised assessment tools such as ADOS-2. This allows our clinicians to observe communication, social interaction, behaviour, play, and emotional responses in a supportive environment.

We also gather information from your child’s nursery, school, or educational setting to understand how they present across different environments and identify any support needs already recognised by professionals.

Educational input provides valuable insight into your child’s strengths, challenges, learning profile, and day-to-day experiences.

4. Parent Interview & Clinical Assessment

Following the observation stage, we complete a detailed parent interview using recognised clinical frameworks such as ADI-R where appropriate.

This discussion helps us build a comprehensive understanding of your child’s:

  • Early development
  • Communication skills
  • Social relationships
  • Behaviour patterns
  • Interests and routines
  • Strengths and challenges

For ADHD assessments, this stage may also include behavioural screening tools, attention testing such as QBCheck, and structured clinical interviews including Young DIVA.

Some elements are completed remotely, while others may involve a single in-person visit.

Our blended approach allows families from across London and beyond to access specialist care without unnecessary travel.

5. Multidisciplinary Review

After all assessment information has been gathered, your child’s case is reviewed by our experienced multidisciplinary team.

This stage ensures:

  • Accuracy in diagnosis
  • Consideration of co-occurring conditions
  • Review of complex presentations
  • Alignment with recognised clinical standards

Where appropriate, we may incorporate input from schools and other professionals to provide a well-rounded understanding of your child’s needs.

6. Feedback About the Diagnosis

Once the multidisciplinary review has been completed, we arrange a dedicated feedback session with parents or carers.

During this appointment, we:

  • Explain the outcome of the assessment
  • Discuss the clinical findings
  • Answer any questions you may have
  • Explain recommendations and next steps
  • Help you understand what the diagnosis means for your child and family

This is often one of the most valuable stages of the process, providing clarity, reassurance, and practical guidance.

7. Written Report & Next Steps

Following the feedback session, you will receive a comprehensive written report outlining the assessment findings, diagnostic conclusions where appropriate, and tailored recommendations for home, education, and future support.

Our reports are routinely accepted by schools, GPs, local authorities, and educational settings. Many families have successfully used our reports to support Education, Health and Care Plan (EHCP) applications and Disability Living Allowance (DLA) claims.

Parents regularly tell us that schools find our recommendations practical, clear, and helpful in supporting their child’s needs both inside and outside the classroom.

Diagnosis is not the end of the journey. It is the beginning of understanding.

We also offer ongoing support through:

  • Psychoeducation sessions
  • Guidance on behaviour and emotional regulation
  • Support with school communication and SEN planning
  • Signposting to trusted services and resources

You can continue learning through our latest blog content, resources, and expert insights.

Benefits of a Structured Assessment Process

Choosing a clear and clinically guided process provides real advantages for both parents and children.

  • Removes uncertainty about what happens next
  • Provides a recognised and trusted diagnosis
  • Enables access to school support and EHCPs
  • Helps parents understand behaviour and needs
  • Supports long-term development and wellbeing
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Why Clarity in the Process Matters

Many families hesitate before booking an assessment because they do not fully understand the journey.

This is completely normal.

Research and performance data show that while more families are visiting ASD Child Ltd, fewer are taking the final step to enquire or book

This highlights a key need:

Clear, transparent information about what to expect.

By outlining the full process, we aim to:

  • Reduce anxiety
  • Build trust
  • Help you make confident decisions

If you would like to understand more about our team and clinical approach, visit our about us page.

Report Recognition & Educational Support

Our comprehensive diagnostic reports are routinely accepted by schools, GPs, local authorities, and other educational settings. Families regularly tell us that our reports have helped them successfully secure Education, Health and Care Plans (EHCPs) and Disability Living Allowance (DLA) for their children.

Parents also report that schools find our recommendations practical, clear, and easy to implement within the classroom environment, helping teachers and support staff better understand and support a child’s individual needs. Our goal is not only to provide an accurate diagnosis, but also to equip families with meaningful guidance that can support positive outcomes at home, in education, and beyond.

Areas We Support

We work with families across:

  • East Dulwich
  • Ealing
  • South London boroughs including Southwark, Lambeth, and Camberwell
  • West London areas such as Acton, Brentford, and Greenford

Our hybrid model means we also support families from across the South East through remote consultations.

Common Concerns About the Assessment Process

Will the diagnosis be recognised?

Yes, all assessments follow NICE and DSM-5 guidelines and are widely accepted by schools, GPs, and local authorities.

How long does the process take?

Timelines vary, but private assessments are typically completed within weeks rather than months or years.

Does my child need to attend in person?

Timelines vary, but private assessments are typically completed within weeks rather than months or years.

What happens after diagnosis?

You will receive a full report and can access ongoing support, including psychoeducation and school guidance.

For more answers, explore our frequently asked questions.

Take the Next Step With Confidence

Understanding your child’s needs starts with a clear, supportive process.

At ASD Child Ltd, we combine clinical expertise with real understanding to guide you from first concern through to diagnosis and beyond. Our goal is simple: to give you clarity, confidence, and a clear path forward.

If you are ready to take the next step, speak directly with our team today.

Call 07878 573131 or email info@asdchild.co.uk